1-D to 3-D lanthanide coordination polymers constructed from 5-aminoisophthalic acid and oxalic acid

Three lanthanide metal organic frameworks (MOFs) with mixed carboxylates of 5-aminoisophthalic acid (H2AIP) and oxalic acid (H2OX), namely [Yb(AIP)(OX)0.5(H2O)3]n·H2O (1), [Tb(HAIP)(OX)(H2O)]n (2), and {[Er(AIP)(OX)0.5(H2O)]·H2O}n (3) were obtained by hydrothermal reactions and characterized by elemental analysis, IR spectra and thermogravimetric analysis, as well as single crystal X-ray diffraction. These frameworks exhibit three typical structural features: complex 1 possesses one-dimensional ladder-like chain, 2 has two-dimensional layer, and 3 is three-dimensional framework. Moreover, the fluorescent property of 2 is also investigated.